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Updated: Jun 13, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Hiding Images in Quantum Correlations
Chloé Vernière1, Hugo Defienne1
1<a href="https://ror.org/02en5vm52">Sorbonne Université</a>, <a href="https://ror.org/02feahw73">CNRS</a>, <a href="https://ror.org/03t2f0a12">Institut des NanoSciences de Paris</a>, INSP, F-75005 Paris, France.
Abstract:
Photon-pair correlations in spontaneous parametric down-conversion are ubiquitous in quantum photonics. The ability to engineer their properties for optimizing a specific task is essential, but often challenging in practice. We demonstrate the shaping of spatial correlations between entangled photons in the form of arbitrary amplitude and phase objects. By doing this, we encode image information within the pair correlations, making it undetectable by conventional intensity measurements. It enables the transmission of complex, high-dimensional information using quantum correlations of photons, which can be useful for developing quantum communication and imaging protocols.
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